// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/public/browser/media_device_id.h"

#include "base/strings/string_util.h"
#include "content/browser/browser_main_loop.h"
#include "content/browser/renderer_host/media/media_stream_manager.h"
#include "media/audio/audio_device_description.h"

namespace content {

std::string GetHMACForMediaDeviceID(const std::string& salt,
    const url::Origin& security_origin,
    const std::string& raw_unique_id)
{
    return MediaStreamManager::GetHMACForMediaDeviceID(salt, security_origin,
        raw_unique_id);
}

bool DoesMediaDeviceIDMatchHMAC(const std::string& salt,
    const url::Origin& security_origin,
    const std::string& device_guid,
    const std::string& raw_unique_id)
{
    return MediaStreamManager::DoesMediaDeviceIDMatchHMAC(
        salt, security_origin, device_guid, raw_unique_id);
}

bool GetMediaDeviceIDForHMAC(MediaStreamType stream_type,
    const std::string& salt,
    const url::Origin& security_origin,
    const std::string& source_id,
    std::string* device_id)
{
    content::MediaStreamManager* manager = content::BrowserMainLoop::GetInstance()->media_stream_manager();

    return manager->TranslateSourceIdToDeviceId(
        content::MEDIA_DEVICE_VIDEO_CAPTURE, salt, security_origin, source_id,
        device_id);
}

bool IsValidDeviceId(const std::string& device_id)
{
    constexpr int hash_size = 64; // 32 bytes * 2 char/byte hex encoding
    if (media::AudioDeviceDescription::IsDefaultDevice(device_id) || device_id == media::AudioDeviceDescription::kCommunicationsDeviceId)
        return true;

    if (device_id.length() != hash_size)
        return false;

    return std::all_of(device_id.cbegin(), device_id.cend(), [](const char& c) {
        return base::IsAsciiLower(c) || base::IsAsciiDigit(c);
    });
}

} // namespace content
